Loose leaf binder mechanism



June 13, 1933. J, C DAWSON 1,913,701

LOOSE LEAF BINDER MECHANISM Filed May 3l. 1930 J/zeS @.awwz

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p 15 levers areprovided;

`Patented `June 13, 1933 i UNITED STATES V,5A-[mer omer e c. DAvvsoiSroF WEBSTER VeRovs, Missounr Assienon 'ro ELMA N. DAWSON,

` `or.vvnnsrna'eiaov71s, nrssoum e roosn LEAFBINDnR riusciramsn!` y l `Animation mea may a1',

The: objects offtheinvention are to provide `a closure for the end of the looseleaf mechanism, which` produces; a 1 neat appearf ance and which at the same, time Willserve as ashieldandretainery` preventing the dislodgment of the anchoring key. e i

These and` other objects" and `advantages Will become apparent `from the specification and theappended dravvingyin which .Fig. 1 illustrates a broken top view of the apparatus; `the upper endofthe binder illustrates its appearance when the booster levers are not provided, and the lowerpor tion illustrates the appearance` when kbooster Fig. 2` is a transverse vice alongthe line 2-1-2'of `lig.r 1;A `.Fig 3 is "a longitudinal section.: `of one endofthe device alongthe line 3.-.-31 of .1.1. ig." 4 illustrates` a longitudinal section `along the line 4;-4 of Fig. l; and 1 .11. `1` Fig. 5 illustrateslan end viewof thedevice when not equipped with boosterflevers and as illustratedintheupper portion of Fig. 1.

`Fig. 6 illustrates an end` view ofthe device when equipped with booster levers and as illustrated inthelovversection of Figl.

` `With reference-to-thegures, the i. paperholdingarches 11 are mountedlupon toggle plates 12. The toggle plates are maintained "in articulated relationship bythe double- `headed studs 13y and are pressed against each other 1 by being held on their gouter edges by the hooked mar ins, 141514 01E-.the

springnbase plate l5. oopsfeatchesuor hooks 16 are struck up "from` the backing `plate 17 and extend through-apert1`1resV 18 cut inthe spring base plate 15. A key 19 49 is then inserted above the spring plate and beneath the loops` holding the binder `in place.- The cover plate 21 issnapped over "the device `to presenta `pleasing anda iin- `ished appearance. .1 i

54H y"The present 1nvention1providesfamask yjengages both ofi the toggle, plates l2, 12.

1930. *serial No. 458.450.

forlthekeyso` fthat it will not be discovered orwithdravv'n. Eachend of the cover plate bears a tongue 22 which maybe scored upon the under side at 27. LA'fter the parts are assembled and the key inserte`d, the"tongue.if f

is depressed and bends dovvn neatly "along the line27.. The key is .thusretained by thecover` and;V masked behind it. i The tongue also forms a complete end closure for thebinderimechanism, since the mar- 50 ginsof the tongue are forced into Contact i with the fabric vof the back.` u

\ When I desire to equip such a binder with ajboostei` or-operating lever, I causea slot 23 to be cut transversely across the cover Vplate-2l *adjacent` the. ends. y rlhe 'slot gives clearance .to `oneyarm2et1of the operating lever25. PreferablyTthe arm`21 is given somewhatofa button shapesolthat it may be moreeasily pushed by the thumb. I also 6 .prefer to fulcrum the'lev`1`erp25V upon the hooked-,marginsld of the spring base plate 15.1This` is illustrated in `.longitudinal section in Figd 1and in .tlieend'vieiv, Fig. 6, i

`Where it will be seen that the operating lever nl 25 is spacedapart romthe bottom of the springbaseplate 15. f Ample clearance is Vthusgivenfto the booster arm 26 Which xiwhenthekarm `24E is pressed, the toggles l2 areforcedwupvvards.and` the arches fly lopen..` `1 V f i. `It has been foundin .ekperiencethat the keys are sometimes thoughtlessly removed, allowing all the papers in the "binder to be removed Without disturbing the appearance Aof the cover.. The mask prevents thisfbut rtofmake the removal ofthe binder mechanism .more difficult, it `isfrequently advisable r Yto use a straight-,piece for the `key 19 instead "a Aont :the anglepiece illustrated. When a flat i baris `usedzand `the guard tongue. 22,-nas shown, acts as a shield,` it is extremely diiicultto; releaseuthe binder mechanism from o' the back.` g

What I claim, therefore, is:

1.,In a device of the class described, the combination of a pair of toggle members articulated at their adjacent edges, a concave resilient plate having an opening in its intermediate portion, flanges on the resil ient plate pivotally engaging the remote edges of the toggle members, a back having a loop projecting through the opening in the resilient plate, a key inserted through the loop above the resilient plate, and a cover plate enclosing the binder mechanism provided with a tongue, the end of which isbent down to form a substantially linear edge at the bend, and' forms the end piece of the mechanism and prevents the dislodg-v ment of the retaining key. y

2. In a device of the class described, a pair of toggle members articulated at their adjacent edges, a concave spring plate having flanges yieldingly engaging the remote edges of the toggle members, a cover provided with a transverse slot, an operating lever having a thumb arm extending outwardly through said slot, said lever extending across the spring plate in spaced relation to its intermediate portion and fulcrumed on its side portions, a projection on the operating lever beneath the toggle members and adapted to urge them upwardly when the thumb arm of said lever is rocked, -a back beneath the spring plate havinga loop eX- tending upwardly through andvabove it, a key above the spring plate Vand extending through the loop, and a tongue on the cover bent to form an end-piece for the `binder mechanism and serve as a retainerfor the ke In a device of the class described, the combination of a pair of toggle members articulated at their adjacent edges, a concave resilient plate having an opening in its intermediate portion, flanges on theresilient plate pivotally engaging the remote edges of the toggle members, a back having a lo o projecting through the opening in the resilient plate, a key inserted through the loop, a cover plate enclosing the mechanism provided with a transverse slot, an operating lever extending through the transverse slot in the cover plate and fulcrumed upon the resilient plate at either side of the key, and a tongue extending from said cover plate and pressed against the back to'form a mask and retainer for said key.

4. In a loose leaf binder, a back, al binder mechanism, means including a key adapted to hold the back and mechanismin position, a cover for the mechanism, the end closure of which is adapted to form a mask for the retaining key to conceal the key and to prevent, its withdrawal vand the consequent disassembly of the binder. v

5. Ina loose leaf binder, a binder mechanism, a back, means for securing the mechanism to the back including a longitudinal key, a cover for the mechanism having a transversely scored tongue bent along the score forming an end closure and masking the key.

6. In a loose leaf binder, a binder mechanism, a back, means for securing the mechanism to the back including a longitudinal key, a conveX cover for the mechanism having a tongue bent downwardly along a substantially straight line to form a closure for the end of the mechanism and presenting acontinuous smooth surface.

7. In a loose leaf binder mechanism in- "cluding'jmeans adapted to support binder rings in open or closed position mounted on a base plate having hooked edges, the Vcombination vof an operating lever for said means having trunnions bearing against said hooked edges, an arm adapted to operate said means, Vand a` thumb arm with a cover plate clasping said hooked edges provided with a slot to receive said thumb arm and having a tongue bent down to close the endof the structure behind said operating lever.

8. The method of manufacturing a loose leaf binder which includes striking up a catch from a backing plate, building the backing plate yinto a back in such a manner that said catch protrudes from the inside of the back, perforating a base plate, mounting a pair of toggle members on the base plate, 'assembling a cover plate with the base plate and toggle members, assembling to the back` the assembly that includes`base-'plate, toggle members and cover plate by passing said .catch through the base plate perforation, inserting a key under said catch to secure the assembly to the back, and bendin the end of'sa'idv cover plate down to mask thekey. Y i l y I 9. The method of fabricating a loose leaf binder which comprises forming a catch on the inner side of abacking plate,'building the backing plate yinto a back while allowing said catch to protrude, forming a perforation'in a base plate to fit the catch, mounting a pair of toggle members on the base plate, applying a cover plate overthe toggle members and enclosing the edges of the base plate, fitting the assembly that includes base plate, toggle 'members and cover plate into place on the back, securing the gether by-passing a key under said catch, and bending down the end of said cover plate to maskthe key. Y i

1 l0. A loose leaf binder mechanism assembled complete for `attachment to a back, having a ybase plate with a perforation therein and adapted-to be applied to a back with an interior projecting catch to fit said perforation,'and a cover plate enclosing the edges of the base plate having ay tongue whichis Yadapted to be bent. down after parts tothe mechanism has been placed on the back and a key insertedl on top of the base plate and through the catch, so `that the key will be maske y 11. The method of assembling a loose leaf binder mechanism, comprising an apertured base plate and a cover plate, with a back havin an upstanding catch, that consists in ttmg the base plate over the catch, insertingY a retaining key under the catch and over the base plate, and bending down the end of the cover plate to mask the key.

` In testimony whereof I aflix my signature.

1 JAMES o. DAWSON. 

